Culvert



Patented Feb. Z6, i924.

JULIUS E. SCHLAFLYLOF CANTON, OHIO, ASSEGNO@ TO THE CANTON CULVERT ANDSIL() COMPANY OF CANTON, OHIO, A. CORPORATION F OHIO.

CUL'VERT.

Application filed November 17, 1819. Serial No. 338,491.

T0 all whom t may cof/tecra.'

Be it known that l, JULrUs H. SGHLAFLY, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented a new and useful Culvert, of which the following is a speciiication.

The invention relates to improvements in sheet metal culverts of thesectional type and has more especial reference to features o-fconstruction designed to guard said sections in shipping, erection anduse.

The objects of the invention are to pro# vide a culvert the end of whichis provided with an integral, annular bead which produce superiorstrength in the culvert and reinforces the end of the culvert in usewhere it projects through a bank or the like and is not protected bymasonry or other outside protecting means, and to generally improve andsimplify corrugated culvert construction.

These objects are attained by first corrugating the sheet from which theculvert is to be formed, then folding the end of the sheet back uponitself and then rolling the folded portion upon a rod or bar to form areinforcing tubular bead of double thickness upon the end of the culvertand integral therewith, the rod or bar upon which the bead is formedbeing either removed or left in the bead as desired.

The sheet is then formed into tubular shape in the usual manner, theoverlapping edges thereof being connected together in any well knownmanner to form the finished culvert. rllhe invention thus set forth ingeneral terms is illustrated in the accompanying drawings forming parthereof, in which- Figure l is a longitudinal sectional View through aportion of a corrugated culvert embodying the invention.

Fig. 2 is a side elevation of a portion of corrugated culvert.

Fig. 3 is an enlarged sectional view through the reinforcing bead, and

Fig. 4 is a view similar to Fig. 3, showing the rod within the bead.

A practical embodiment of the invention 50 is disclosed in theaccompanying drawings, forming a part of this specification in whichsimilar numerals of reference indica-te corresponding parts throughoutthe several views.

At 1 is indicated a portion of a culvert,

which may be plain or corrugated or partly plain and partly corrugated,as desired, b-ut circumferentially corrugated culverts are commonlypreferred and have so illustrated them. rlhe culvert may be formed of asingle corrugated sheet bent into cylindrical form, the edges being`overlapped and connected in any suitable and well known manner or theculvert may be made of two sheets each bent into semi-cylindrical form,the edges being connected together by any usual method.

ylhe sheet from which the culvert is formed is first corrugated intheusual manner after which the end of the sheet is folded back upon itselffor the required distance, forming a reinforced end upon the sheet of adouble thickness of the sheet metal. rlhc folded end of the sheet isthen bent into U-shape upon a suitable die after which a rod or bar 2 isplaced within the bent portion of the sheet and the end of the sheet isbent or rolled upon the rod forming a bead 3 of double thickness uponthe end of the sheet. The rod 2 may be left within the bead, to furtherreinforce the same, as shown in Fig. 4, or it may be removed as shown inFigs. l and 3 thereby leaving a hollow bead.

The contour of the corrugated culvert illustrated presents a series ofalternate valleys and ribs 4 and 5 respectively and it will be notedthat the culvert terminates in a valley in which the bead 3 is formed,the bead being substituted upon the end of the culvert for a rib and theroll of the be-ad being continued tangent to the connected wall of theculvert.

fter the bead has been thus formed upon the end of the sheet, one end ofthe bead is out away for a distance corresponding to the overlappedportions of the edges of the sheet, as shown in dotted lines at 6 inFig. 2, and the sheet is bent or formed into tubular shape, in the usualmanner, the longitudinal edges of the sheet being overlapped as shown indotted lines at 7 in Fig. 2 the overlapped portions being connectedtogether by rivets 8 or their equivalents.

For the purpose of strengthening the bead at the point where the endsthereof are butted together a sheet metal clip 9 is located around thejoint in the bead and connected to the culvert upon each side of thejoint by means of rivets l0 or the like.

rlhis clip may be substantially U-shaped in the initial form and isplaced around the joint in the bead and riveted to the culvert afterwhich` it is bent inwardly against the bead as shown at ll in Fig. 3.

ln forming the bead upon the end of the culvert the folded back portionat the end of the culvert may be of sufficient lengthto allow the rolledback edge of the bead. to rest upon the folded portion, as shown at12fin Fig.` 4.-, or it may be only longpenough to allori7 the rolledback edge of the beadlto be bent down adjacent to the periphery of theculvert, as shown at 13 in 3.

The strengthening bead thus formed upon the endv of' the culvertproduces superior strengthin the culvert, reinforcing the end of thesame and preventing bending or other damage to said end in handling andtransportation and provides l an integral reinforcement upon the culvertWhich protects the exposed end of the culvert which may protrude througha bank or Wall or the like, preventing serious injury to the culvert endWithout the necessity of buildingv a masonry reinforcement around theprotruding end of the culvert.

This reinforcement isespecially useful inV metal culvert having an`annular. tubular bead at its end formed by rolling plural plies of themetal at the end of the culvert back upon themselves.

3. A circumferentially corrugated sheet end of the culvert baclruponitself and thenY f vert back upon itselfv andthen rolling the foldedportion upon itself.

7. A sheet metal culvert provided upon its end With an integral/tubularbead'formed by folding the metal at the end ofthie cul. vert back uponitself and then rolling.. the folded portion upon a rod.

8. A sheet metal culvert provided at itsl end with an integral annulartubular bead formed of a double thickness'of metal from which theculvert is formedv and a rodi located Within said bead.

JULIUS SCHLAFLY.

